How to remove prefix in nginx reverse proxy configuration

使用nginx做反向代理的时候，可以简单的直接把请求原封不动的转发给下一个服务。设置proxy_pass请求只会替换域名，如果要根据不同的url后缀来访问不同的服务，则需要通过如下方法：

方法一：加"/"

server {
    listen              8000;
    server_name         abc.com;
    access_log  "pipe:rollback /data/log/nginx/access.log interval=1d baknum=7 maxsize=1g"  main;
 
    location ^~/user/ {
        proxy_set_header host $host;
        proxy_set_header  x-real-ip        $remote_addr;
        proxy_set_header  x-forwarded-for  $proxy_add_x_forwarded_for;
        proxy_set_header x-nginx-proxy true;
 
        proxy_pass http://user/;
    }
 
    location ^~/order/ {
        proxy_set_header host $host;
        proxy_set_header  x-real-ip        $remote_addr;
        proxy_set_header  x-forwarded-for  $proxy_add_x_forwarded_for;
        proxy_set_header x-nginx-proxy true;
 
        proxy_pass http://order/;
    }
}

^~/user/表示匹配前缀是user的请求，proxy_pass的结尾有/， 则会把/user/*后面的路径直接拼接到后面，即移除user。

方法二：rewrite

upstream user {
 server localhost:8089 weight=5;
}
upstream order {
 server localhost:8090 weight=5;
}
 
server {
 listen  80;
 server_name abc.com;
 access_log "pipe:rollback /data/log/nginx/access.log interval=1d baknum=7 maxsize=1g" main;
 
 location ^~/user/ {
 proxy_set_header host $host;
 proxy_set_header x-real-ip $remote_addr;
 proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
 proxy_set_header x-nginx-proxy true;
 
 rewrite ^/user/(.*)$ /$1 break;
 proxy_pass http://user;
 }
 
 location ^~/order/ {
 proxy_set_header host $host;
 proxy_set_header x-real-ip $remote_addr;
 proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
 proxy_set_header x-nginx-proxy true;
 
 rewrite ^/order/(.*)$ /$1 break;
 proxy_pass http://order;
 }
}

proxy_pass结尾没有/， rewrite重写了url。

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